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Transporting voice over IP, instead of traditional CS voice, is a necessary prerequisite for an all IP network. Among the hurdles that need to be overcome are the QoS demands of VoIP, which comprise timely and error free delivery of comparatively low rate packet streams. One way to provide the necessary QoS for VoIP is some admission control strategy, where an incoming connection that cannot have...
The growth in the number of voice over IP (VoIP) users on the Internet makes it the service with the highest interest to be provided by cellular operators. On the other hand, it demands very strict QoS control, which becomes even more complicated in wireless networks, because packets can be lost due to radio link transmission errors, as well as network congestion. Within this paradigm, scheduling...
By means of dynamic system-level simulations, this work evaluates whether the studied Packet Scheduling (PS) algorithms are capable of guaranteeing the quality of service (QoS) of the voice over IP (VoIP) on a scenario where the VoIP and Web browsing services will compete for the same resources and there is a maximum allowed end-to-end delay for VoIP packets. Two sets of algorithms were considered:...
In this paper we investigate the characteristics of the Voice over IP service deployed over 3G mobile network HSDPA. The necessary protocols for Voice over IP may provide controlled delivery of multimedia traffic over Internet and wireless technologies. We evaluate the VoIP service using a simulator that models the HSDPA system. Results are manifested in terms of packet loss rate, delay and delay...
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